Favorite 3D modeling software? 3D printing

We asked this on the discord channel, as the title says, tell us about your favorite 3D modeling software. This request would be aimed at developing composite parts or 3D printing parts for racing vehicles.
Tell us about your experience with files being used in the modeling software and for 3D printing. Do you own or operate a 3D printer?

Do you use a 3D print service in the South Florida region? Please post about your experiences.
If anyone has 3D scanning capabilities in South Florida area we need help with scanning front suspension components to help develop brake ducts.